I was wondering if anyone has compared the SVS PB10 to the HSU VTF-2 or STF-2... I have a budget of $500 and am considering all of these subs. I don't really want to end up paying postage to send one back if I don't like it... My room is about 13'x14' with a vaulted ceiling, completely open on one side. I listen equally to music and movies. Reading reviews here has been very helpful except I havn't seen any direct comparisons. I currently own an old dbx 15" passive sub, it's got a huge cabinet and plays down to 27 hz. But at about 40 hz it's too boomy, and at over 14 years old it's time to upgrade. Thanks in advance for any advise you have to offer.